slippage, disparity, discrepancy, imbalance, dichotomy, gap, incongruence, inconsistency, matchup, disconnect, disproportion, miscommunication, misalignment, deficiency, difference, letdown, shortage, problem, divergence, disequilibrium, conundrum, inequity, asymmetry, differential, lopsidedness, shortcoming, disjunction, crunch, misunderstanding, discontinuity, disadvantage, contradiction, dissimilarity, dilemma, quandary, variation, weaknesses, lacuna, disjuncture, incongruity, shortfalls, dearth, misallocation, overestimation, inadequacy, rematch, overmatch, maldistribution, bottleneck, direct correlation, undersupply, chinks, similarity, fallacy, underestimation, mistake, chasm, tradeoff, paradox, miscalculation, slugfest, dislocation, paucity, inefficiency, flaw, achilles heel, scarcity, congruity, stinker, sloppiness, discordance, showdown, rift, gulf, inverse relationship, measuring stick, dropoff, barnburner, unbalance, falloff, inequality, aberration, interrelation, pitfall, weakness, incompatibility, correlation, constraint, breakdown, tiff, anomaly, shakiness, tussle, irregularity, misjudgment, glut, underconsumption, blunder, drawback, variability, oversimplification, linkage, mismatches, distortion, disparities, divergences, inequalities, inequities, misfit, overlap, deviation, deviations, distortions, error, coupling, interaction, multiplicative, thermoelastic, timedependent, attentional, skew, diffusional, expectational, multifactorial, nonadiabatic, regulation, scattering, synthesis, advective, allocational, allocative, arousal, articulatory, conditioning

couple, match, mate, pair, twin